Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

Representative implementations of devices and techniques provide a tactical pen that may include various useful features and components, according to various embodiments. In the implementations, the tactical pen is comprised of multiple components (e.g., two or more sections) which may be coupled together and which may be sealed with one or more seals to provide moisture or humidity protection to the contents of the pen. For example, in addition to an ink pen refill (e.g., ball-point pen refill), the tactical pen may include one or more cavities or compartments to store items, a sharp implement, as well as one or more additional tools or implements.

A stylus includes in a tubular casing a core body, a pressure detector that detects a pressure applied to the core body, a coupling fitted over the core body, the coupling transmitting the pressure to the pressure detector, and a core pressing controller that controls the coupling to press the core body axially in the tubular casing. The coupling includes a push bearer that bears a push from the core pressing controller, a presser having an axial end fitted in the pressure detector, a fitting region fitted over a portion of the core body remote from a pen tip end of the tubular casing, a receptacle in which another end of the presser remote from an axial end thereof is axially movably housed, and an elastic member disposed in the receptacle, the elastic member biasing the other end of the presser resiliently toward an axial pen tip end of the receptacle.

A beat recording pen for the recording and editing music and while serving as writing instrument. The device includes a retractable writing instrument disposed in an elongated shaft designed to house a power supply designed to provide electrical power to a transceiver that can transmit and receive digital signals to and from a connected mobile device or computer. The beat recording pen further includes an impact sensor that can detect an audio input signal of an impact event and convert the audio input signal into a digital signal. A micro-controller is disposed within the pen and can record the converted audio input signals detected by the impact sensor and interface with a software application installed on a connected mobile device or computer.

A combination writing utensil and handcuff tool including a writing utensil having a slotted interior chamber and a plurality of spring-loaded buttons. A pair of writing tips is disposed within the slotted interior chamber, with each of a first of the pair of writing tips and a second of the pair of writing tips engaged with each of a first of the plurality of spring-loaded buttons and a second of the plurality of spring-loaded buttons, respectively, and lockably extended through an opening of the writing utensil. Additionally, each of a handcuff key and a handcuff lock is disposed within the slotted interior chamber of the writing utensil. Each of the handcuff key and the handcuff lock is engaged with each of a third of the plurality of spring-loaded buttons and a fourth of the plurality of spring-loaded buttons, respectively, and lockably extended through the opening of the writing utensil.

A marker ensemble is provided, having a multi-purpose marking tool and a sharpener.

The marking tool has a shell, retention sleeve, compression spring, control tab, reversible disk holder, and cap. The shell has an exit opening, an access opening with a mounting socket, and a medially located lateral control slot through which the control tab extends. The retention sleeve has a collet, compressed by the compression spring and uncompressed by the control tab. The disk holder has a body with a retention ridge and a pair of lugs extending from each end to retain a marking disk. One marking disk has a circular periphery and the other marking disk has a toothed periphery. The cap is mounted upon either end.

The sharpener includes a blade with a sharpened edge secured to a body with an upper surface, a peripheral surface with a shoulder, waist, and hip, and a lower surface.

A writing instrument attachment includes first and second band portions and a coupling mechanism. The first band portion include a first inner surface defining a passageway along a longitudinal axis and a first outer surface having a first outer radius that encompasses the first inner surface. The second band portion is integrally affixed to an end of the first band portion. The second band portion includes a second inner surface defining a chamber along the longitudinal axis having an inner radius that is greater than the first outer radius. The coupling mechanism includes a groove located at a first position on the second inner surface and a tab located at a second position on the outer surface. The first position and the second position are collinear.

Disclosed is a pen for writing, referred to as a palm pen herein because the body of the pen fits into the palm of a human hand. The palm pen can include a spherically shaped body, and an ink delivery system. The ink delivery system can include a tip having an end connected to the body and an opposite end comprising a nib, an ink conduit having an end coupled to the nib within the tip and an opposite end extending inside the body, and a first ink cartridge fluidly coupled with the opposite end of the ink conduit and contained within the body. The ink delivery system can additionally include a cartridge holder having an active cartridge slot for the first ink cartridge and cartridge storage slots for storage of additional ink cartridges.

Example clippable multi-tone whistles, as well as systems and methods for manufacturing the same are described. An example clippable multi-tone whistle may comprise: a clip attached to a whistle body. The whistle body comprises a flat surface under the clip; a first opening configured to allow air flow to come into the whistle body; and on the flat surface a second opening configured to allow air flow to come out of the whistle body. The second opening is at least partially blocked by the clip, which controls direction of one or more air flows coming out of the second opening. The whistle part is configured to generate a plurality of different sound tones in accordance with user finger movements around the clip and the second opening. The whistle may further comprise a glass breaker, a length scale, and a bolt action switch, which may function as a fire starter.

Promotional items with enhanced advertising messaging. More specifically, embodiments are directed to a metallic-finished promotional item with a laser-engraved message that is illuminated or backlit by incorporating a light source into the promotional item. The light source acts to illuminate or brighten the laser-engraved message when the light source is powered on. Furthermore, according to embodiments, when the light source is not in use, the laser-engraved message remains appealing, hereinafter referred to daylight appeal, due to its enhanced contrast with the surrounding metallic finish.